Generate __version__ at build to avoid slow importlib.metadata import

Author: hugovk

.gitignore

@@ -90,3 +90,6 @@ ENV/
 
 # pytest
 .pytest_cache/
+
+# hatch-vcs
+src/*/_version.py

pyproject.toml

@@ -42,6 +42,9 @@ scripts.blurb = "blurb.blurb:main"
 [tool.hatch]
 version.source = "vcs"
 
+[tool.hatch.build.hooks.vcs]
+version-file = "src/blurb/_version.py"
+
 [tool.hatch.version.raw-options]
 local_scheme = "no-local-version"
 

src/blurb/__init__.py

@@ -1,3 +1 @@
-import importlib.metadata
-
-__version__ = importlib.metadata.version(__name__)
+from ._version import __version__